CN1269948A

CN1269948A - Interface for connecting standard telephone set to radio telephone system

Info

Publication number: CN1269948A
Application number: CN98808868A
Authority: CN
Inventors: E·P·莫顿; H·马洛
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 1997-09-05
Filing date: 1998-09-03
Publication date: 2000-10-11
Also published as: WO1999013659A1; AU8878998A; GB9718938D0; GB2329095A

Abstract

An interface unit is described, allowing a standard DTMF telephone set to be connected to a cellular or satellite radiotelephone system. The unit is able to monitor the duration of each DTMF tone sent thereto, and a call is initiated when the duration of one tone exceeds a predetermined duration.

Description

Standard telephone set is connected to the interface of radio telephone system

The present invention relates to a kind of telecommunication installation, relate in particular to and a kind ofly allow a fixed-line subscriber to be linked into device in a honeycomb or the satellite telephone system.More particularly, the present invention relates to one and be used for a kind of interface unit that can be used to a standard telephone set is connected to satellite or cellular radiotelephone system.

United States Patent (USP) 4,775,997 have described a kind of permission is connected to the system of honeycomb type transceiver with the telephone set of a standard, and this system can be used as a transmission and the fixed station that network communicates via satellite.Its advantage is to need not to set up a fixed link from network to this transceiver.

In order to make this service offer the user as far as possible pellucidly, above-mentioned United States Patent (USP) 4,775,997 allows the keypad tone or the DTMF telephone set of a standard is coupled.The difference of this method be in: in order to be linked into network, cellular transceiver must send the user dial-out numeral and in company with sending " transmission " signal.When cellular transceiver was the mobile phone of a special use, this moment was as long as push " transmission " on telephone set.Yet, when the user has an interface system by above-mentioned United States Patent (USP) 4,775,997 types to be connected to the standard telephone set of cellular transceiver, just do not have such " transmission " button.In addition, as mentioned above.Because of requiring to make service transparent as far as possible, so require when by any other telephone system originating call, the user to be reacted as quickly as possible.

Therefore, in such system, must provide a kind of and be used for detecting user when and finish mechanism the dialing of called party.At United States Patent (USP) 4, in 775,997, can determine how many numerals expection has by analyzing several leading the number of being dialled, after the digital number of necessity, send one " transmission " sign indicating number then and realize, or send one " transmission " during one period scheduled time after transfering to a numeral and yard realize.

Yet the shortcoming of this method is: this a period of time must be quite long, because the normal interval between numeral can be very long, thereby makes the origination process phase delay because of experiencing one period scheduled time.

WO96/32824 has described another system of this common type, when the user dials " # " character, sends " transmission " signal.

Yet the shortcoming of this method is that the requirement user dials a specific additional character, so reduced the transparency of system.

The present invention relates to a kind of interface unit, it allows standard telephone set to link to each other with a radio telephone transceiver, and allows to detect with the inconvenience to user's minimum the end of dialing.

Specifically, when the user dialed the number that will call out, native system can detect the dtmf tone that is produced by standard telephone set.When surpassing a scheduled time, detects the duration of a dialing tone end of dialing.This scheduled time can considerably lack, because the normal duration of a dialing tone is relatively shorter.

Its reaction is fast as far as possible when the invention enables employing system of the present invention to use the telephone set that links to each other with a switch by a fixed link to make a phone call.

Fig. 1 is the block diagram of an interface of the present invention.

Fig. 2 is a flow chart of describing cell operation of the present invention.

Fig. 3 is the flow chart of work of the unit of an alternative embodiment of the invention.

Fig. 1 shows the telephone system that comprises interface unit 2 of the present invention.This unit 2 comprises one by suitable antenna 6 and radio set 4 such as the such network service of honeycomb or satellite network.Transceiver is under the control of microcontroller and corresponding memory 8.Unit 2 also comprises a Subscriber Line Interface Circuit (SLIC) 10, it also under the control of microcontroller 8, and with a standard DTFM phone 12, or other DTMF generators link to each other.The dialing tone that 14 responses of DTMF detector receive monitors the output signal of SLIC and links to each other with microcontroller 8.An audio producing device 16 will produce ring and other sounds and deliver to SLIC10 under the control of microcontroller 8, be transferred to the user and use.SLIC10 also is connected to radio set 4 and carries out voice communication.

So far, the composition of unit 2 be with for example United States Patent (USP) 5,117,450 of routine or WO96/32824 in the same.

Fig. 2 is first method of work that is illustrated in the unit of the present invention under the indication of microcontroller 8.Processing is in step 30 beginning, for example, when detect subscriber phone during off-hook treatment step begin.In step 31, monitor that the signal that receives at SLIC10 is to determine whether to receive a DTFM sound.Then,, confirm the DTFM numeral, and start dialing stop timing device in step 33 immediately when receiving a signal tone in step 32 when being dtmf tone.Then, in step 34 supervisory signal, up to representing this digital signal tone to finish.When detecting the end of digit, handle and enter step 35, determine whether that the dialing timer regularly stops before the end of digit.If no, in other words, if the time ratio predetermined lasting time that the DTFM signal tone continues is short, step enters 36, and the termination timing device also resets, and enters step 37 then, before returning step 31, with detected stored digital with memory that microcontroller 8 is associated in.

Yet, if determining dialing stop timing device in step 13 finishes when the DTFM sound finishes predetermination, in other words, signal tone continues longlyer than predetermined lasting time, then handles entering 38, in this step, detecting dialing is considered to finish, then, in step 39, call out according to the numeral of former storage.

So microcontroller is set a predetermined lasting time, for example, can be in one second scope.If this time of the time ratio that any button is pressed is long, then determine dialing and finish, send and call out.Be noted that in this example, last numeral, promptly its signal tone lasts longer than the numeral of predetermined lasting time, does not store and do not form the part of dialing.

Fig. 3 has represented another selectable process, and wherein step 30-39 is corresponding to the step of above-mentioned Fig. 2.Yet this process comprises an additional step, and step 40 detects in step 38 and finished after the dialing stored digital that detects at last to be got up.The consequently last numeral that detects is being used among the numeral of originating call, so formed a part of dialing.

Obviously, above-mentioned principle can be used for those modes except that above-mentioned specific descriptions.For example, can monitor the state of dialing stop timing device continuously, if make signal duration than predetermined length, then timer one stops getting final product originating call (the both available numeral that also can detect at last), and need not to wait for the end of last signal tone.In addition, describe though the present invention is used for originating call according to it, otherwise use also is fine.For example, when as described above a particular key being pressed than the calling of can starting of predetermined lasting time length, the particular key of pressing other is than the long service or the function that perhaps can insert other of the scheduled time, such as switch number storage or change ring configuration between voice and fax.

Described one and allowed the user to be linked into the unit and the method thereof of satellite or cellular system, and made the difference between this use of using and standard telephone set is connected to a fixed network make it minimum from the DTFM telephone set of a standard.

Claims

1. interface unit, comprise and be used for being connected the device of a telephone set with it, a radio set, be used for detecting to the device of the dtmf tone of its transmission and be used for it is characterized in that when the device that detects the calling of starting when dialing finishes with comprising: this unit also comprises the device of the duration that is used for detecting each detected dtmf tone and is used for working as the dtmf tone duration of being detected and detects the device that dialing finishes when having surpassed the scheduled time.

2. interface unit as claimed in claim 1 comprises being used for storing corresponding to the device of the numeral of the dtmf tone that is detected and being used for when the device that detects the calling that the number of the numeral of storage regulation is arranged of starting when dialing finishes.

3. interface unit as claimed in claim 2 has wherein been formed a part that dials corresponding to detecting the duration above the numeral of the scheduled time.

4. interface unit as claimed in claim 2, wherein the numeral that surpasses the dtmf tone of the scheduled time corresponding to the detected duration is not formed the part of dialing.

5. interface unit, comprise the device that is used for to its connection telephone set, a radio set and a device that is used for detecting to the dtmf tone of its transmission is characterized in that: this unit also comprises the device of the duration that is used for detecting each detected dtmf tone.

6. interface as claimed in claim 5 comprises the device that is used for inserting a business when the duration of a detected dtmf tone surpasses the scheduled time.

7. interface unit as claimed in claim 5, the dtmf tone that one of them detected its duration surpasses the scheduled time is used to insert a specific function.

8. interface as claimed in claim 7, wherein the scheduled time is about one second.

9. interface as claimed in claim 7, the function that wherein is access in depends on detected dtmf tone.

10. one kind is connected to the method for a wireless network with a call, and this method comprises:

Detect the numeral that each is dialled on the DTMF phone by the user;

Store the numeral that each is dialled;

Monitor the duration of the numeral that each is dialled;

Surpass the numeral that the scheduled time sends the dial-out of being stored during the limit when the duration of the numeral of a dial-out.

11. a method that inserts a telephony feature in wireless network, this method comprises:

A DTMF phone is connected to an interface unit;

In telephone unit, detect the key of pressing by the user; With

Surpass a scheduled time and insert one during the limit when detecting time that key presses

Professional.

12. method as claimed in claim 11 comprises the duration of supervision by the dtmf tone that interface unit received.